These look as if they belong more with the same sort of ranges and period as the "free-form" limited edition pieces produced for a short while, fairly recently, Nic.
I'm sure jakgene showed a "Cyclone" vase (amongst others), from this "free-form" sets of things fairly recently.
It's the complexity as well as the style of bubbles included that makes me think this. They do look very "Sarah Petersen" - I have no problems with this attribution, though I'm no ex-spurt on this.
And yes, Caithness, Christine, thanks, I forgot to mention that!
I see Frank's "Glass Images" are currently unavailable online, due to lack of funds to support the site. :thud:
I shall have to do a bit of organising to arrange it, but will be contributing something shortly. :thup:
It's an incredible resource.